The invention relates to a device for reducing the load on a supporting structure comprising a housing defining a chamber, at least one object having a first face and a substantially opposite second face mounted in the chamber by means of the supporting structure and is displaceable relative to the housing leaving free a gap provided with a seal separating a first section and a second section of the chamber, an exposing means for exposing at least the first face to a gas pressure, thereby generating an upward differential pressure force at least partially compensating the object weight, wherein the seal is supported by a movable part of the housing and the device further comprises a means for adjusting the position of at least said movable part.